Chemistry - January 2007

2007-01-15 22:55:20 · 9 answers · asked by ally 2

2007-01-15 22:34:20 · 3 answers · asked by roger s 1

2007-01-15 21:48:52 · 6 answers · asked by Nat K 1

2007-01-15 19:33:46 · 6 answers · asked by Anonymous

2007-01-15 19:26:46 · 1 answers · asked by Sharmin Sultana Dipti 1

2007-01-15 19:10:29 · 4 answers · asked by julka323 3

what type f jobs are available there for B.Sc chemistry student

2007-01-15 19:07:47 · 4 answers · asked by princess 1

How can I prepare KCr(SO4)2*12H2O and in which group of bound does it belong?

2007-01-15 18:23:54 · 1 answers · asked by Andreja K 3

How can I quantitative define kalium in komplex K3[Cr(NCS)6[*4H2O?

2007-01-15 18:19:44 · 5 answers · asked by Andreja K 3

2007-01-15 18:01:57 · 9 answers · asked by jenningssamuel 1

please give me other formula if provided.

2007-01-15 17:54:19 · 12 answers · asked by Ezar E 1

2007-01-15 17:44:19 · 2 answers · asked by The little "T" 3

2007-01-15 17:36:27 · 10 answers · asked by Galyose 1

2007-01-15 17:04:16 · 2 answers · asked by ladyspades08 1

Please go to the link for the whole question, since there is a diagram involved. http://i141.photobucket.com/albums/r74/magicalplay/AnhsChemhw.jpg

2007-01-15 17:01:25 · 1 answers · asked by magicalplaygirl 1

In his backyard he has a rectangular pool that measures 30 feet by 15 feet. Jon’s entire back yard is grass except for the swimming pool. What is the total area of Jon’s back yard that has grass? Do not forget to show your work.
I HAVE THE ANSWER BUT I NEED TO BE SURE

2007-01-15 17:00:58 · 7 answers · asked by princess 1

You Don't have to answer all of these questions, but please answer in full.

1. I know that if you were to add a (-) to an element it means there is one extra electron
ie: Cl- P+ 17 e- 18 n0 14
(correct me if I'm wrong and say why)

Now what I am confused about is what do you do if it is Cl+? How wuld you determine the number of protons, neutrons, and electons? Why? I need as much information as I can get for this!!!


2. How mant protons and neutrons are in this isotope:

65
30 Zn


Explain please!!

2007-01-15 16:49:57 · 5 answers · asked by blackfever08 2

First solve for x and then solve for the length of the rectangle. Do not forget to check your work.

THANK YOUUUUUUUUUU

2007-01-15 16:48:20 · 3 answers · asked by princess 1

80.000 g of a hydrate lost 14.698 g on heating. The anhydrous salt contains 21.800 g calcium, 0.548 g hydrogen, 18.847 g phosphorus, the rest being oxygen. What is the simplest formula of the hydrate?

2007-01-15 16:32:08 · 3 answers · asked by Meno 1

These are Chemistry Pressure Unit Conversians that I need help on.

2.2 atm to mmHg;

789 torr to kPa;

202kPa to atm

and...

3409mmHg to atm?

I need help on only those 4 problems outta the 30 I got. Please help me!

2007-01-15 16:31:14 · 6 answers · asked by ? 6

2007-01-15 16:14:23 · 6 answers · asked by Anonymous

A. become heated
B. be mixed with catalysts
C. collide with other molecules
D. increase their surface area

2007-01-15 16:12:10 · 3 answers · asked by Anonymous

A. polyethylene
B. carbon dioxide
C. sodium chloride
D. copper (II) chloride

2007-01-15 16:08:21 · 4 answers · asked by Anonymous

A. one breaks down into at least two products
B. a compound is decomposed by an electric current
C. a compound burns in the presence of oxygen
D. a new, more complex compound is formed

2007-01-15 16:04:44 · 2 answers · asked by Anonymous

A. chemical symbols
B. subscripts
C. coefficients
D. reactants

2007-01-15 15:59:03 · 3 answers · asked by Anonymous

Im Not a terrorist and dont intend on using the nitrate for a bomb but I intend on using it as a propellant. Dont lecture me on the laws I know trust me. Does anyone know how to purify it. I know you can purify KNO3 by recrystalization. The source i have is ammonium nitrate fertilizer which is 30-0-0. I know it burns because i sloshed some on the fire and it made it flare up. But someone please help!

2007-01-15 15:43:36 · 1 answers · asked by jesse6317 2

The measured pH= 5.18 for a solution containing 25.0mL 1.M NaCH3COO and 10 mL1.0 M CH3COOH. Calculate the corresponding value of Ka for the acetic acid.

2007-01-15 15:41:25 · 1 answers · asked by Anonymous

i'm also a bit confused about fission vs fusion. and why does one word have 2 s's and the other 1 but they sound the same. just ignore that question for now.
talk to me about basic forms of these reactions

2007-01-15 15:34:14 · 5 answers · asked by smokesha 3

2007-01-15 15:20:59 · 1 answers · asked by st 1

what is the organization of the subatomic particles in the quantum model? clear and short answer please!

2007-01-15 15:19:05 · 3 answers · asked by perfectionistjc 2